Improvement in flour-bolts



UNITED STATES A,

PATENT OFFICE.

JOHN TJEERTIG, OE BROOKLYN, NEw YORK.

IMPROVEMENT IN FLOUR-BOLTS.

Specification forming part of Letters Patent No. 151,769. dated June 9,1874; application filed March 30, 1874.

To all whom it may concern Be it known that I, JOHN THOMAS FERTIG, ofBrooklyn, Kings county, State of New York, have invented a new anduseful Improvement in Bolters for Flour-Mills and other purposes, ofwhich the following is a specification:

Several plans have been adopted for the purpose of obtaining a tightjoint at the tail end of a circular, hexagonal, or Octagonal bolter, orat that end where the grit or bran issues from the bolter, so that anydraft or wind produced by the conveyer shall not be able to blow thegrit or bran back into hutch among the bolted flour; but none of themhave given any satisfactory result.

To obtain this object forms the nature of my invention, which consistsin the arrangement of a head on the tail end of the bolter, providedwith a large circular opening, supported in the end of hutch, in whichthe bolters are placed, and made perfectly tight by means of hair felt.On the inside of this bolter-head radiating flanges are attached,through which the grit or bran is carried from the bottom of the bolterupward, and is then, through diag- Onal or conical ribs or flangesattached to each side of these radiating flanges, conducted into thecircular opening in the head and into the grit or bran conveyer.

By this arrangement, any draft or wind produced Vby the conveyer, or byany other means,

can blow t-he grit or bran only back again into the bolter, to be forcedout again as above mentioned, but will prevent the grit or bran frombeing blown into the hutch and mix with the already-bolted our.

In the accompanying drawing a part of a bolter is represented embodyingmy invention.

A represents a bolter, of circular, hexagonal, or octagonal form, andconstructed in the usual manner of lathsa, running parallel with itsaxis b, and resting on spokes c, with the cloth tentered round thelaths. This bolter is placed somewhat obliquely in the bolting-hutch B,and revolved in the usual manner. The upper end of the bolter isprovided with a wooden crown, d, whose interior diameter leavessuflicient room for the introduction of the usual gutter, by which theground mass goes into the bolter. The lower or tail end of the bolter,where the grit or bran passes out, is provided with a head, D, having acircular ring or tube, E, on its outside, turning in a suitable openin gin the end partition F of the bolting-hutch B. Between the outside ofthe ring or tube E and the inside of the opening in the partition Ffelt, with the wool or hair on, is placed, to make a tight joint, andprevent the air or grit from passing. On the inner side of the head Dradiating anges G, running from the wooden frames or laths a forming thebolter-reel to to axis b, are securely fastened. On each side of theseradiating flanges G diagonal ribs J, running toward the circular openingortube E, are fastened. t

Instead of these diagonal ribs a cone may be placed upon the axis b,with its point or vertex projecting into the opening or tube E, and theradiating :flanges Gr running from the laths a to the surface of saidcone.

The ground mass having passed-through the bolter A, whereby the liourhas been bolted out of the bolter, the grit or bran, when arriving atthe lower end of the bolter, is taken'up by the radiating flanges G andcarried upward, and slides toward the axis by its own weight until itcomes against the diagonal anges or ribs J, (or against the surface ofthe cone, if a cone is used,) and is thrown by the same into the ring ortube E, and falls then out of the same into the opening H, and fromthere into the conveyer.

By this arrangement the grit or bran is easily thrown or moved out ofthe bolter through the central tube E into the opening H leading -to theconveyer; and, by means of the circular ring or tube E, moving in thehutch-partition F, and packed by felt or any other suitable material,yafperfectly-tight joint will be obtained, whereby any grit or bran willbe prevented from being blown into the hutclrbox B and mix again withthe bolted iour.

What I claim as my invention, and desire to secure by Letters Patent, is

1n combination with the lower or tail end of a bolter, A, a head, D,provided on its outer surface with a circular ring or tube, E, turningtight in the hutch-partition F,.1and on its inner surface with radiatingAlanges G, having diagonal ribs or flanges J, all arranged andconstructed substantially in the manner and for the purpose set forth.

JOHN THOMAS FERTIG.v

Witnesses:

HENRY E. ROEDER, A. E. COLLINS.

